User Authentication to parent proxy question

["Markus Moeller" <huaraz@xxxxxxxxxxxxxxxx>]

Hi,

 If  I have a parent proxy which requires NTLM or Kerberos user 
authentication can I use login=PASS to do that ?

e.g.

cache_peer parent.foo.net       parent    3128  3130  proxy-only default 
login=PASS

 Is it also possible that the child does not authenticate the user but just 
hands the authentication through to the parent ?

Thank you
Markus